R help - Jul 2014 - Socket Connection in R

I am trying to create socket connection in R.

    socket <- make.socket("localhost",2099,T,T)
   
msg2<-'function=subscribe|item=MI.EQCON.1|schema=last_price;ask;bid'
    write.socket(socket,msg2)
    read.socket(socket,252,FALSE)

When I run the read.socket line, I get error:

    Error in read.socket(socket, 252, FALSE) :
    embedded nul in string:
'þþ-\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\001\0\004\0CTCL\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0'

I am Unable to solve this problem. Please advice how to get rid of this
issue.


Regards,

	[[alternative HTML version deleted]]

On 01/07/2014 13:37, Param Jeet wrote:
> I am trying to create socket connection in R.
That is not a 'socket connection'.  I suggest you use one instead: see 
?socketConnection.
>
>      socket <- make.socket("localhost",2099,T,T)
>     
msg2<-'function=subscribe|item=MI.EQCON.1|schema=last_price;ask;bid'
>      write.socket(socket,msg2)
>      read.socket(socket,252,FALSE)
>
> When I run the read.socket line, I get error:
>
>      Error in read.socket(socket, 252, FALSE) :
>      embedded nul in string:
>
'????-\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\001\0\004\0CTCL\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0'
>
> I am Unable to solve this problem. Please advice how to get rid of this
> issue.
The help says

      ?read.socket? reads a string from the specified socket,

'Strings' do not have embedded nulls: you need something which can do 
binary reads.  For that you need to use connections.
>
>
> Regards,
>
> 	[[alternative HTML version deleted]]
>
>
>
> ______________________________________________
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> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>

-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
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